Commission Regulation (EC) No 1693/2002 of 25 September 2002 initiating an investigation concerning the alleged circumvention of anti-dumping measures imposed by Council Regulation (EC) No 1784/2000 on imports of certain malleable cast iron tube or pipe fittings originating in Brazil by imports of certain malleable cast iron tube or pipe fittings consigned from Argentina, and making such imports subject to registration